Identify what the link opens
A shared link might lead to a product, a store, an album or an agent page. Check the destination domain before entering account details. If the item has moved, use its descriptive details to search again.
Match the actual variant
Compare the product identifier, colour, size and included items. Two similar pictures may describe different variants. Read the current description and ask the destination service about missing details.
Keep a useful record
Save the original listing URL with the date and your own notes. A screenshot can help you remember a variant, but it does not prove present availability or that an item will match it.